package com.thinkbiganalytics.kylo.reactive;

/*-
 * #%L
 * Spark Shell Service Controllers
 * %%
 * Copyright (C) 2017 - 2018 ThinkBig Analytics, a Teradata Company
 * %%
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 * #L%
 */

import org.reactivestreams.Publisher;
import org.reactivestreams.Subscriber;

/**
 * Receives push notifications.
 *
 * @param <T> type of element signaled
 */
public interface CancellableSubscriber<T> extends Subscriber<T> {

    /**
     * Requests the {@link Publisher} to stop sending data and clean up resources.
     */
    void cancel();
}
